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Hierarchical Porous Carbon Arrays Derived from Directly Carbonizing Carex Meyeriana for Counter Electrodes of High-Efficiency Dye-Sensitized Solar Cells
- Source :
- Energy & Fuels. 34:8905-8910
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- Hierarchical porous carbon arrays (HPCAs) are facilely produced by directly carbonizing Carex meyeriana through a self-activated and self-template process. The morphology analysis and nitrogen sorption measurements reveal that the obtained HPCAs have a large specific surface area and unique hierarchical pore structure comprising macropore channel arrays and micropores and mesopores developed on the wall of macropore channels. The HPCA electrodes are subsequently prepared by depositing HPCAs to the fluorine-doped tin oxide conductive substrate. Electrochemical tests demonstrate that the HPCA electrode shows a superior electrocatalytic activity for the regeneration of the Iā/I3ā electrolyte. The superior electrocatalytic activity of HPCA electrodes is mainly due to the combined effect of unique hierarchical pore architecture and large surface area, which facilitates the electrolyte diffusion and provides the abundant effective electrocatalytic active sites. Under 1 sun illumination, the HPCA electrode-based dye-sensitized solar cell displays a gratifying conversion efficiency of 6.45%, which is close to that based on commonly used Pt electrodes.
- Subjects :
- Materials science
General Chemical Engineering
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
Electrolyte
021001 nanoscience & nanotechnology
Electrochemistry
Tin oxide
law.invention
Dye-sensitized solar cell
Fuel Technology
020401 chemical engineering
chemistry
Chemical engineering
law
Specific surface area
Electrode
Solar cell
0204 chemical engineering
0210 nano-technology
Carbon
Subjects
Details
- ISSN :
- 15205029 and 08870624
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- Energy & Fuels
- Accession number :
- edsair.doi...........b25f17750b68ca6b6f338e20e70c7f9c